default to identity-hash

diff --git a/typing/ItemKeyFun.c b/typing/ItemKeyFun.c
index 81e4b9ab2c74dc436f326cd522084caac1ab5ef0..2b1d3725c43248ca5d3d9302ee82f5c9eff79280 100644 (file)
--- a/typing/ItemKeyFun.c
+++ b/typing/ItemKeyFun.c
@@ -21,8 +21,7 @@ unsigned long ItemKeyFun_hashcode(void *this,void *key) {
  */
 void *ItemKeyFun_itemkey(void *this,void *item) {
     ItemKeyFun *type = (ItemKeyFun*) this;
-    assert( type );
-    return type->itemkey? type->itemkey( type, item ) : item;
+    return ( type && type->itemkey )? type->itemkey( type, item ) : item;
 }
 
 /**
@@ -30,8 +29,7 @@ void *ItemKeyFun_itemkey(void *this,void *item) {
  */
 int ItemKeyFun_haskey(void *this,void *item,void *key) {
     ItemKeyFun *type = (ItemKeyFun*) this;
-    assert( type );
-    if ( type->haskey ) {
+    if ( type && type->haskey ) {
        return type->haskey( this, item, key );
     }
     void *ikey = ItemKeyFun_itemkey( this, item );
@@ -45,8 +43,7 @@ int ItemKeyFun_haskey(void *this,void *item,void *key) {
  */
 void ItemKeyFun_releasekey(void *this,void *key) {
     ItemKeyFun *type = (ItemKeyFun*) this;
-    assert( type );
-    if ( type->releasekey ) {
+    if( type && type->releasekey ) {
        type->releasekey( type, key );
     }
 }
@@ -56,8 +53,7 @@ void ItemKeyFun_releasekey(void *this,void *key) {
  */
 int ItemKeyFun_tostring(void *this,void *item,char *buffer,int limit) {
     ItemKeyFun *type = (ItemKeyFun*) this;
-    assert( type );
-    if ( type->tostring ) {
+    if( type && type->tostring ) {
        return type->tostring( type, item, buffer, limit );
     }
     void *key = ItemKeyFun_itemkey( this, item );